section.article-welcome {
  background: url('../img/article_welcome.png');
  background-size: contain;
  padding: 40px 5%;
  text-align: center;
}
@media only screen and (min-width: 500px) {
  section.article-welcome {
    padding: 70px 5%;
  }
}
@media only screen and (min-width: 1430px) {
  section.article-welcome {
    padding: 80px 5%;
  }
}
@media only screen and (min-width: 1700px) {
  section.article-welcome {
    padding: 150px 5%;
  }
}
section.article-welcome button {
  margin: 20px 0px 0px;
}
@media only screen and (min-width: 768px) {
  section.article-welcome button {
    margin: 50px 0 0;
  }
}